The US department of transportation, National Highway Safety Administration, rep
ID: 3177783 • Letter: T
Question
The US department of transportation, National Highway Safety Administration, reported that 77% of all fatally injured automobile drivers were intoxicated. Suppose a particular county would like to test if the proportion of fatal accidents in their county related to alcohol is less than the national proportion. They take a SRS of 27 records from fatal accidents and find 19 of them had an intoxicated driver. What is the parameter of interest? Is the parameter categorical or quantitative? What type of procedure is appropriate for this scenario and why?
Explanation / Answer
Answer to the question:
1. Parameter of interest is the proportion of fatal accidents in country that relate to alchohol
2. The parameter is quantitiative
3. We can use the t test for evaluate this scenrio. t test will give if there is a significant difference between national proportion and sample proportion.
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